| Gene Symbol | NLRP12 |
|---|---|
| Full Name | NLR Family Pyrin Domain Containing 12 |
| Chromosomal Location | 19q13.4 |
| NCBI Gene ID | 338139 |
| OMIM | 609648 |
| Ensembl ID | ENSG00000142405 |
| UniProt ID | Q9Y4X5 |
| Associated Diseases | Periodic Fever Syndrome, Neuroinflammation, Inflammatory Arthritis, Colitis |
| Expression | Myeloid cells (monocytes, macrophages, neutrophils), brain microglia, liver, spleen |
NLRP12 (NLR Family Pyrin Domain Containing 12), also known as NALP12 or monarch-1, is a member of the NOD-like receptor (NLR) family that functions primarily as a negative regulator of innate immune signaling. Unlike pro-inflammatory NLRs such as NLRP3, NLRP12 suppresses NF-κB activation and inflammatory gene expression[1]. It is highly expressed in myeloid cells (monocytes, macrophages, neutrophils) and is present in brain microglia, positioning it to modulate neuroinflammatory responses in Alzheimer's disease and Parkinson's disease[2].
NLRP12 mutations cause a spectrum of autoinflammatory disorders, including familial cold autoinflammatory syndrome (FCAS) and periodic fever syndromes, underscoring its role as a gatekeeper of inflammatory responses[3].
NLRP12 negatively regulates NF-κB signaling through multiple mechanisms:
This anti-inflammatory function is distinct from the inflammasome-forming NLRs[4].
Although primarily an NF-κB regulator, NLRP12 can form inflammasome complexes that activate caspase-1, leading to processing and secretion of IL-1β and IL-18. The inflammasome-forming activity appears to be signal- and cell-type-specific, and may be distinct from its NF-κB regulatory role[5].
NLRP12 interacts with:
NLRP12 mutations cause autosomal dominant periodic fever syndromes:
Expressed in brain microglia, NLRP12 may regulate neuroinflammatory responses to protein aggregates such as amyloid-beta and α-synuclein[2:1]. Altered NLRP12 expression in microglial cells could influence:
Dysregulated NLRP12 contributes to inflammatory arthritis. Mouse models of NLRP12 deficiency show exacerbated joint inflammation, suggesting a protective role against inflammatory arthropathies.
NLRP12 protects against dextran sulfate sodium (DSS)-induced colitis in mouse models. Dysregulation may contribute to inflammatory bowel disease pathogenesis.
NLRP12 is predominantly expressed in:
Expression is regulated by pro-inflammatory stimuli (LPS, TNF-α) and anti-inflammatory cytokines (IL-10).
Normand S, et al. NLRP12 is a negative regulator of TLR-induced NF-kB and inflammatory gene expression. J Immunol. 2011. ↩︎
Zhu J, et al. NLRP12 in immunity and disease. Mol Immunol. 2020. ↩︎ ↩︎
Jeru I, et al. Mutations in NLRP12 cause familial cold autoinflammatory syndrome. Nat Genet. 2008. ↩︎ ↩︎
Allen IC. NLRP12 is a negative regulator of inflammation. Nat Rev Rheumatol. 2012. ↩︎
Borghini S, et al. Clinical presentation and pathogenesis of NLRP12-linked periodic fever syndrome. Arthritis Rheum. 2011. ↩︎ ↩︎